html {
    width: 1536px;
}
a {
    color: black;
}

.header .header-top {
    height: 30px;
    background: cornflowerblue;
    line-height: 30px;
}

.header .header-top .h-width {
    margin: 0 auto;
    width: 1000px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header .header-top .right{
    width: 150px;
    display: flex;
    justify-content: space-between;
}

.header .header-bottom {
    margin: 0 auto;
    width: 1000px;
    height: 70px;
    display: flex;
    justify-content:space-between ;

}

.header .header-bottom .left {
    width: 275px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header .header-bottom .left img {
    width: 70px;
    height: 70px;
    border-radius: 50%;
}

/* 就是为了有趣一点 */
.header .header-bottom .left img:hover {
    animation: loading 3s linear infinite;
}

@keyframes loading {
    /*以百分比来规定改变发生的时间 也可以通过"from"和"to",等价于0% 和 100%*/
    0% {
        /*rotate(2D旋转) scale(放大或者缩小) translate(移动) skew(翻转)*/
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.header .header-bottom .left .company h4 {
    width: 200px;
    letter-spacing: -1px;
    font-weight: 300;
}

.header .header-bottom .right ul {
    width: 600px;
    display: flex;
    justify-content: space-between;
}

.header .header-bottom .right ul li {
    width: 65px;
    height: 70px;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.header .header-bottom .right ul li a {
    /* line-height: 70px; */
    font-weight: 600;
}

.header .header-bottom .right ul li:hover {
    background: lightseagreen;
    border-bottom: 4px solid palevioletred;
}

.subject .background img {
    width: 1536px;
    margin-bottom: 20px;
}


.footer {
    font-size: 13px;
    width: 1536px;
    color: white;
    background:rgb(7, 124, 163);
}

.footer .f-top {
    padding: 10px 0;
    text-align: center;
}

.footer .f-top a img{
    height: 16px;
    margin-right: 22px;
}

.footer .f-bottom {
    background: black;
    height: 30px;
    line-height: 30px;
    text-align: center;
}

.footer .f-top a:last-of-type img {
    padding-top: 3px;
}

.footer .f-top ul li a {
    color: white;
}

.footer .f-top ul {
    width: 450px;
    margin: 10px auto;
    display: flex;
    justify-content: space-between;
}

.footer .f-top ul li~li::before {
    content: "";
    width: 3px;
    height: 3px;
    display: inline-block;
    background: white;
    border: 1px solid white;
    border-radius: 50%;
    margin-right: 10px;
    margin-bottom: 3px;
}

